Which of the following statements is true?

A.The subjects in a cross-sectional research are not of the same age group. B.The methods of study in longitudinal research will not change over time. C.Longitudinal research is reliable only in seeking understandings of the effects of early experiences on later development. D.Cross-sectional methods are not usually adopted in studying, for example, the changes in intelligence over a thirty-year period. 此题为多项选择题。

时间:2024-04-20 23:08:05

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